Nut-lock.



No. 658,089. Patented Sept. 18, I900.

' R. LAURIN.

NUT LOCK.

(Application filed Sept. 8, 1898.;

(No Model.)

UNITED STATES PATENT ()l FICE.

ROBERT LAURIN, OF CHICAGO, ILLINOIS.

NuT-LocjK..

SPECIFICATION forming part of Letters Patent No. 658,089, datedSeptember 18, 1906.

Application filed September a, 1896. Serialllo. 605,161. (No model.)

To all whom it may concern.-

Be it known that I, ROBERT LAURIN, a citizen of the United States,residing at Chicago, Cook county, State of Illinois, have invented a newand useful Nut-Lock, of which the following is a specification.

My invention relates to improvements in nut-locks.

The object of the invention is to provide a simple, inexpensive, andefi'icient means of preventing a nut or bolt from accidental roration orbecoming unscrewed and at the same time provide a nut-lock which can beoperated to release the nut or bolt at the will of the operator withoutdestroying or injuring either the nut-lock, bolt, or nut. I accomplishthis object bymeans of the device hereinafter fully described in theaccompanying drawings, in which- Figure 1 is a plan view of the deviceasapplied to a fish-plate or any place where two or more bolts are usedin close proximity to one another. Fig. 2 is a sectional view on thelines 1 2, Fig. 1, partially in perspective. Fig. 3 is a perspectiveview of the device as applied to a single bolt. Fig. 4 is a perspec tiveView of the catch Z.

Like letters refer to similar parts throughout the several views.

I) represen ts a bolt, h its head, and 'n. the nut."

- 00 represents the web of a rail or any material held between the headand nut of the bolt.

10 and 19 represent two plates or washers, (made of iron or othermetal,) one of which is placed immediately under the head of the boltand one immediately under the nut, and in the case of a rail-joint thefish-plates may be so designed as to answer the purpose, as will behereinafter set forth. The plates or washersp and p are to be sodesigned as to be kept from revolving or turning around the bolt. Thismaybe accomplished in any practicable manner, as by having the piececontinuous and extending over two or more bolts, Figs. 1 and 2, or byany suitable lug or bur y, Fig. 3. The plates or washers p v and 19 haveright-angled'triangular openings or sockets I, so placed that the rightangle or apex of the opening shall be away from the bolt and the longside shall be at right angles to the line of the radius of the bolt, and

its center shall be at a distance from the center of the bolt equal toone-half the width of the'nut or head of the bolt. Into this socket oropening is placed the catch or locking device Z, which is a piece ofangle-irou'or other metal having its foot or base 1*, Fig. 4.-, cuttriangular to fit easily into the opening I and its upright 1?, Fig. 4,of a suitable height to catch the head or nut of the bolt.

In describing the operation the word nut will be considered as applyingto both head and nut. 1

In operation after the nut is screwed up tight one side of the nut n andhead h are brought parallel with the long side of the openings orsockets Z and the catches Z are put into their places, when by givingthe nut a slight back turn the corners of the nut project over thetriangular base Z and strike against the upright 1 the nutthus holdingthe catch Z in place by projecting over the base Z and is prevented fromfurther unscrewing by the upright Z It is self-evident that the nut orbolt will not turn to free the catch Z without force, as in so doing itwould of necessity screwitself that much the tighter, the upright Zbeing placed opposite to one another for head and nut of the same bolt.

In making the socket Z it is not necessary that it extend through theplate p, but only so deep as will provide for sufficient thickness ofthe foot Z and thus by making fishplates with suitable sockets thecatches Z would be the only additional expense to securely lock thebolts and nuts of an ordinary rail-joint. I prefer to make the foot l atthe point a slightly thinner than at the back to facilitate the turningbackof the nut and prevent the nut striking against the foot Z inturning back against the back or upright 1". Though this is notessential to the device, I mention it for the purpose of setting itforth in my claim.

I am aware that nut-locks have been made having washers or plates withlugs or spurs to prevent them from turning, Fig. 3. I am aware thatprior to my invention nut-locks with some likeness to lock Fig. 4 havebeen made. I therefore do not claim such a combination broadly; but asmy invention of the triangular base Z of lock Fig. 4 and the triangularsocket of plate is not a shape or form l is taken from any other forms,but is a form every corner of four-corner nuts possesses to the line ofthe radius of the nut on bolt; but

What I do claim as new, and desire to secure by Letters Patent, is

In a nut-lock, the combination of a Washerplate having atriangular-shaped slot therein, of a catch having a base portion fittingsaid slot and having a flange extending along one side of said baseportion, said flange being 16 adapted to engage the side of the nut,substantially in the manner and for the purpose set forth.

ROBERT LAURIN.

Witnesses:

WILLIS T. GRIFFITH, H. BASSET'I SHERMAN.

